JP2894538B2 - Die holding device for extrusion press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die holding device in an extrusion press for a metal such as an aluminum alloy, and more particularly, to cutting a die card, which is a remaining part of a billet after extrusion, at a front side of the die. The present invention relates to a die holding device capable of easily and easily positioning a cut surface.

[0002]

2. Description of the Related Art Conventionally, in an extrusion press, after extruding, a container is separated from a die and retreated, and then a disc card, which is the remaining portion of the billet, is cut by a shear blade at the front side of the die, and is extruded. Had been separated. On the other hand, conventionally, there is a clearance in the extrusion direction between the die loading portion of the die slide, which is a die holding member, and the die because the die is taken in and out.

[0003]

Therefore, conventionally, the position of the end face of the die fluctuates due to the change in the temperature of the die, and the die moves in the extrusion direction when the disk is cut by the shear blade. When the distance between the shear blade and the end face of the die increased, the cut of the discard card became worse. For example, when there is a porthole on the container side of the die, the extruded material such as an aluminum alloy in the porthole is cut off by shearing. As a result, at the time of extrusion in the next cycle, there is a disadvantage that air in the space thus cut off is trapped in the extruded product, and bubbles or blisters are generated in the extruded product.

[0004] As one method for solving this drawback,
For example, the invention described in Japanese Patent Application Laid-Open No. 3-184616 is known. However, Japanese Patent Application Laid-Open No. Hei 3-18
Japanese Patent No. 4616 discloses a structure in which the entire die slide is pulled and moved in the extrusion direction via a die slide gib that guides and holds the die slide, and thus has a complicated structure. , And the operation was not always easy and reliable. In the case of JP-A-3-184616,
No special consideration was given to the shear device.

[0005]

According to the present invention, in order to solve these problems, an inner peripheral projection of a hose shoe is provided on an outer peripheral step on a side opposite to a pushing direction of a die installed in a die holding hole of a die slide. In a die holding device of an extrusion press in which a hose shoe is attached to a die slide with the hook engaged, the hose shoe is attached to the die slide so as to be movable in the extrusion direction and the counter extrusion direction, and when an external force in the extrusion direction acts on the hose shoe. The outer peripheral step on the side opposite to the extrusion direction of the die is pushed in the extrusion direction by the inner periphery projection of the hose, and the end surface of the die in the extrusion direction is pressed against the block of the end platen, and the die is positioned in the predetermined extrusion direction. It was positioned.

In this device, a hose shoe is attached to the die slide with bolts fixed to the die slide, and a compression spring is attached between the hose shoe in the extrusion direction and the die slide in the opposite extrusion direction. The gap between the die slide and the hose when the is pressed in the direction opposite to the extrusion direction is larger than the gap between the outer peripheral step on the side opposite to the extrusion direction of the die and the inner circumference projection of the hose. The pushing of the hose in the pushing direction may be performed by a part of the discard cutting device that comes down at the time of cutting, or by the action of a cylinder provided in the die slide. May be.

[0007]

[Function] When the extrusion operation is completed, the container is moved away from the die and retreated, and the discard portion is exposed to the air. Then, the shear cylinder device for cutting the discard is operated to cut the discard with the shear blade. At this time, the guide device and the shear blade are lowered while a part of the pressing device of the shear cylinder device is actuated, and the hosehush is pushed in the pushing direction, or the cylinder in the die slide is actuated to push the hosehush in the pushing direction. Press

As a result, at the time of cutting, the die is pressed in the extrusion direction, and if the shear blade is also pressed to the front side of the die, the positions of the cutting surface of the die front and the shear blade are always Since it is at the preset position, the clearance between the front surface of the die and the shear blade is also kept at the preset size, so that good cutting is performed. As a result, a good extruded product without air entrainment and without blisters can be obtained easily and reliably. Further, according to the present invention, it is possible to cut cleanly, leaving one film of 0 to 0.3 mm.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing a partial sectional view, FIG. 2 is a longitudinal sectional view showing a state immediately after cutting a disk card, and FIG.
2 is a partially enlarged cross-sectional view of FIG. 2, and FIG. 4 is a rear view of the shear and the guide device as viewed from the die slide side. In FIG. 1, 1 is an end platen, 2 is a die, 3 is a die slide, 4 and 5 are guide members for guiding the movement of the die slide 3 in a horizontal direction perpendicular to the paper surface, and 6 is a pressing force from the die 2. The block in the end platen 1 to be received. A hole through which the product extruded from the die 2 passes is provided in the center of the block 6 and the end platen 1. The die 2 is composed of several parts as shown. Reference numeral 7 denotes a container including a container tube 7a, a container body 7b, a container holder 7c, and the like.

A frame 8 is attached to the container 7 above the end platen which holds the die 2 on the front side.
A shear cylinder device 10 for cutting a disc card is attached to a part of the frame 8 by a shaft 9 so as to be rotatable in the extrusion and anti-extrusion directions. In the shear cylinder device 10, reference numeral 11 denotes a shear cylinder, reference numeral 12 denotes a piston rod, and a shear slide 13 is attached to a lower end portion of the piston rod 12.

A shear blade 14 is attached downward at the center of the inside of the shear slide 13, and guide rollers 15 are die-slid on both sides of the shear blade 14 of the shear slide 13 as shown in FIGS. 2 to 4. Several pieces were arranged in the vertical direction on the three sides, and each was rotatably mounted. 15a is a bearing integrally provided on the die slide 3 side of the shear slide 13;
b is a shaft that rotatably supports the guide roller 15. The surface of the shear blade 14 on the die 2 side and the guide roller 15
The horizontal distance between the surfaces on the side of the die slide 3 is kept at a predetermined constant distance. The lower end of the guide roller 15 is positioned lower than the lower end of the shear blade 14 by, for example, a radius or a diameter of the die 2.

On the upper part of the frame 8, a pressing device for swinging the shear cylinder device 10 around the shaft 9 or adjusting the clearance between the shear blade 14 and the front surface of the die 2 is also used. Cylinder 1 for tilting
6 was attached, and the tip of the piston rod 17 of the cylinder 16 was attached to a part of the shear cylinder 11. Cylinder 1
The mounting positions of the piston 6 and the piston rod 17 were considerably higher than the position of the shaft 9. In the hydraulic circuit for the cylinder 16, an electromagnetic relief valve (not shown) is provided, and the pressure is appropriately controlled so that the clearance between the die surface and the shear surface is considerably small, for example, 0 to 0.3 mm. Can be adjusted and set in advance to an appropriate value.

As shown in FIG. 3, the outer peripheral step of the die 2 is slightly smaller in diameter than the extrusion direction to form an outer peripheral step. A hose shoe 18 capable of holding the die 2 at the step is provided in the direction side. That is, the inner peripheral projection of the hose shoe was engaged with the outer peripheral step on the side opposite to the extrusion direction of the die. A disc spring 19 is provided between the back surface of the hose shoe 18 and the bottom of the groove 3a for attaching the hose shoe of the die slide 3.
8 was attached to the die slide 3 by bolts 20.

The hose shoe 18 is attached to the die slide 3 so as to be movable in the pushing direction and the anti-extrusion direction. As described later, when an external force acts on the hose shoe 18 in the pushing direction, the inner peripheral projection of the hose shoe 18 is used. The outer peripheral step on the side opposite to the extrusion direction of the die 2 is pushed in the extrusion direction, and the end face of the die 2 in the extrusion direction is pressed against the block 6 of the end platen 1 to position the die 2 at a position in the predetermined extrusion direction. I did it.

In this case, a disc spring 1 which is a kind of compression spring is used.
The gap between the die slide 3 and the hose shoe 18 when the hose shoe 18 is pushed in the non-extrusion direction side by the action of 9 makes the outer peripheral step portion of the die 2 in the non-extrusion direction side and the inner peripheral projection of the hose shoe 18 into a gap. Larger than the gap between them.

Therefore, the horseshoe 18 is usually
3 is slightly pushed to the right side by the action of the disc spring 19, the vertical surface of the inner peripheral projection of the hose shoe 18 in the pushing direction is slightly separated from the vertical surface of the outer peripheral step of the die 2, and The vertical surface on the outer side in the extrusion direction is slightly larger than the bottom of the groove 3a of the die slide 3, but when pushed from the right side in FIG. Moved in the extrusion direction, hose shoe 1
The vertical surface of the inner peripheral projection 8 in the pushing direction hits the vertical surface of the outer peripheral step of the die 2 and pushes the vertical surface, and the vertical surface of the hose shoe 18 on the outer peripheral side in the pushing direction is the die slide 3. A little away from the bottom of the groove 3a.

A guide plate 21 is fixed to the hose shoe 18 and moves up and down with the guide roller 15 pressed against the surface of the guide plate 21. Therefore, the guide roller 15 device can be said to be a guide device capable of pressing the die 2 toward the end platen 1 via the hose shoe 18. The container 7 at the upper end of the guide plate 21 has a tapered notch so that when the guide roller 15 descends, the guide plate 21 starts to smoothly and smoothly hit the container 7 side of the guide plate 21. is there.

In the shear cylinder device 10 shown in FIG. 1, 22 is a moving member provided integrally with the piston rod 12, 22a and 22b are detection rods provided above and below the moving member 22, respectively. A bracket integrally and directly or indirectly attached via a member 25 above and below the shear cylinder 11, respectively.
On the lower part of the bracket and on the upper part of the bracket 24,
For example, position detecting devices 26 and 27 such as limit switches and magnetic sensors are attached, and the ascending and descending limits of the shear slide 13 and the piston rod 12 to which the shear blade 14 and the guide roller 15 are attached, respectively, can be transmitted. Like that.

Next, the operation of this device will be described.
First, when the extrusion operation is completed, as shown in FIG. 1, the container 7 and the extrusion stem (not shown) are retracted, and the container 7 is separated from the die 2. Then, a disc card, which is a remaining part of the billet (not shown), appears in the air. In this state, the shear blade 14 and the like are at the upper limit. Next, the piston rod of the cylinder 16 is advanced slightly,
The shear cylinder device 10 is kept vertical. FIG. 1 shows the state at this time.

Next, the shear cylinder 11 is operated to lower the shear slide 13. Then, first, the guide roller 15 hits the surface of the guide plate 21 and continues to descend in that state. When the guide roller 15 hits the guide plate 21, the hose shoe 18 overcomes the force of the disc spring 19 and is slightly pushed in the pushing direction, and the hose shoe 18 pushes the step of the die 2. The die 2 is pressed against the block 6 on the end platen 1 side, and the front surface of the die 2 is at a desired fixed position. This is performed before cutting by the shear blade 14.

While maintaining this state, the guide roller 15
At the same time, the shear blade 14 descends, and the disk card is cut by the shear blade 14 soon. At this time, the guide roller 15
The horizontal distance between the surface on the side of the end platen 1 and the cut surface of the shear blade 14 on the side of the end platen 1 is previously adjusted to an appropriate constant distance. Therefore, the distance between the end surface of the die 2 and the surface of the shear blade 14 is, for example, 0 to 0.3 mm.
It is kept at a constant clearance.

By adjusting the hydraulic pressure of the cylinder 16, the pressing force of the guide roller 15 and the shear blade 14 against the end platen 1 is adjusted to a desired value. Therefore, the discard card is always cut straight and in a good condition with a smooth cut surface without peeling or the like, with one fixed film of, for example, 0 to 0.3 mm remaining. As a result, entrainment of air and generation of blisters are also eliminated.

In this device, the position where the piston rod 17 of the cylinder 16 is attached to the shear cylinder 11 is
Since the rotation shaft 9 is provided at a position which is considerably higher than the position of the shaft 9 which is the swing center axis and does not receive the reaction force of the shear cylinder 11 by the tilting cylinder 16, the end surface of the die 2 is The pressing force can be easily controlled by pressure control using an electromagnetic relief valve or the like. As a result, the shear blade 14
The cut surface on the die side due to the shear slide reaction force, which is seen when the angle is sharp, is eliminated, and the die side cut surface without unevenness can be obtained easily and reliably.

The die 2 is pressed by a roller guide provided on the shear slide 13 via the guide plate 21 and the hose 18 during the shearing, so that the temperature of the die 2 changes, the clearance for inserting the die receiver, and the like. The discard card can be cut without being affected by the factors while maintaining the clearance between the surface of the die 2 and the surface of the shear blade 14 at a value set in advance by adjustment. Therefore, as described above, since the thickness of the aluminum alloy or the like remaining in the die 2 can be made constant, a uniform flat die-side cut surface can be obtained. Further, for the above-mentioned reason, it is possible to prevent the blister from being wound around the extruded product due to the defective cut surface on the die side.

FIG. 2 shows the state after the cutting of the disk card is completed. When the cutting of the disk card is completed, the cylinder 16 is actuated to slightly rotate the shear cylinder device 10, the guide roller 15 is separated from the guide plate 21, and the guide roller 15 is separated from the guide roller 15 while the shear cylinder device 10 is slightly inclined. Raise the shear blade 14. Then, the cylinder 16 is operated at the ascending limit to return the shear cylinder device 10 to the vertical state, and one cycle is completed.

Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a front view of a die and a hose shoe as viewed from the container side, and FIG. 6 is a sectional view taken along line AA of FIG. 5 and 6, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof will be omitted. 5 and 6, the illustration of the guide members 4 and 5 is omitted.

5 and 6, the hose shoe 18 is attached to the die slide 3 by bolts 20 fixed to the die slide 3 so as to be movable in the pushing direction and the opposite pushing direction, similarly to the one shown in FIG. A disc spring 19, which is a kind of compression spring, is mounted between the extrusion direction side of the die 18 and the direction opposite to the extrusion direction of the die slide 3, and the hose spring 18 is pushed in the direction opposite to the extrusion direction by the action of the disc spring 19. The gap a between the die slide 3 and the hose shoe 18 is slightly larger than the gap b between the outer peripheral step on the side opposite to the extrusion direction of the die 2 and the inner peripheral projection of the hose shoe 18. When an external force in the pushing direction acts on the hose shoe 18, the hose shoe 1
8, the outer peripheral step on the side opposite to the extrusion direction of the die 2 is pushed in the extrusion direction, and the end face in the extrusion direction of the die 2 is pressed against the block 6 of the end platen 1 part. And the relationship with the lowering position of the shear blade 14 is the same as that described in the first embodiment.

A part of the outer periphery of the hose shoe 18 is provided with, for example, two convex flange portions 18a at two locations. On the other hand, a cylinder 28 is buried in the die slide 3 in the direction opposite to the extrusion direction, as shown in FIG.
An arm 30 for holding a was attached.

Normally, the hose shoe 18 is at the position shown in FIG. 6 by the action of the disc spring 19 and the bolt 20, but if pressure oil is applied to the rod end side of the cylinder 28, the action of the arm 30 is achieved. The hose shoe 18 is pressed against the pushing direction side overcoming the action of the disc spring 19, and the die 2 is pressed against the block 6 to perform positioning at the time of cutting. When the hose 20 is removed from the die slide 3 by removing the bolt 20, the piston rod 29 and the arm 30 are made to protrude greatly. In the case of the second embodiment, an ordinary shear device having no guide roller 15 or the like can be used.

[0030]

According to the present invention, as described in the claims, the hose shroud is attached to the die slide so as to be movable in the extrusion direction and the counter-extrusion direction. The outer peripheral step on the side opposite to the extrusion direction of the die is pushed in the extrusion direction by the inner peripheral projection of
The end face in the extrusion direction of the die is pressed against the block of the end platen part, and the die is positioned at the position in the predetermined extrusion direction. Therefore, only the hose shroud can be moved to position the die. The operation is relatively simple and easy.

Then, the hose shoe is attached to the die slide with a bolt fixed to the die slide, and a compression spring is attached between the pushing direction side of the hose shoe and the opposite pushing direction side of the die slide. The gap between the die slide and the hose when it is pushed in the direction is larger than the gap between the outer step on the side opposite to the extrusion direction of the die and the inner projection of the hose. The die can be pressed against the block by a hose shoe by the external force generated by the action of the above, and the positional relationship between the die and the shear blade can be easily and reliably maintained in a desired state when cutting the disk card.

Therefore, in this state, the disk card can be cut by the shear blade, and a good flat cut surface can be obtained easily and reliably. And good extrusion molding can be performed without causing air entrainment or blistering in the extruded product of the next cycle.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of the present invention in a partial sectional view.

FIG. 2 is a vertical sectional view showing a state immediately after cutting a disk card using the present invention.

FIG. 3 is a partially enlarged cross-sectional view of FIG. 2;

FIG. 4 is a rear view of the shear or guide device of the device shown in FIG. 1 as viewed from a die slide side.

FIG. 5 is a front view of a part of a die and a hose shoe showing a second embodiment of the present invention as viewed from a container side.

FIG. 6 is a sectional view taken along line AA of FIG. 5;

[Description of Signs] 1 End platen 2 Dice 3 Die slide 6 Block 7 Container 8 Frame 9 Axis 10 Shear cylinder device 11 Shear cylinder 12 Piston rod 13 Shear slide 14 Shear blade 15 Guide roller (guide device) 16 Tilting cylinder ( Pressing device) 18 Hose shoe 19 Disc spring 21 Guide plate 28 Cylinder 30 Arm

Claims (2)

(57) [Claims] 1. A die of an extrusion press in which a hose is attached to a die slide in a state where an inner peripheral projection of the hose is engaged with an outer peripheral step on a side opposite to the extrusion direction of the die installed in a die holding hole of the die slide. In the holding device, the hose shroud is attached to the die slide so as to be movable in the extrusion direction and the anti-extrusion direction. A die holding device of an extrusion press, wherein the die is pushed in the extrusion direction, the end face in the extrusion direction of the die is pressed against the block of the end platen portion, and the die is positioned at a predetermined position in the extrusion direction. 2. The hose shoe is attached to the die slide with a bolt fixed to the die slide, and a compression spring is attached between the pushing direction side of the hose shoe and the opposite pushing direction side of the die slide. 2. The gap between the die slide and the hose shoe when being pushed in the direction side is made larger than the gap between the outer peripheral step portion on the side opposite to the extrusion direction of the die and the inner circumferential projection of the hose shoe. A die holding device for the extrusion press described.